Change-gear mechanism.



PATENTED FEB. 19, 19071 W'- L. SGHELLENBAGH. CHANGE GEAR MECHANISM.

APPLICATION FILED FEB. 16, 1905.

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W. L. SCHBLLENBAGH. CHANGE GEAR MECHANISM.

APPLICATION FILED FEB. 16, 1905.

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CHANGEPGEA R MECHANISM.

Specification of Letters Patent. Application filed February 16, 1905. Serial No. 245,816.

Patented Feb. 19, 1907.

T0 aZZ whom it may concern:

Be it known that I, WILLIAM L. SoHEL- LENBAOH, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Change- Gear Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in change-gear mechanism.

One of its objects is to provide an improved and more simple mechanism for changing the applicable to engine-lathes and other tools.-

Another object is to provide a mechanism having a greater range of speed changes than those heretofore in use.

Another object is to provide a mechanism in which the changes can be more readily and quickly effected.

It further consists in certain details of form, combination, and arrangement, all of which will be'more fully set forth in the de-' scription of the accompanying draw ings, in

.JIU u t on. N represents the eccentric or tumwhich Figure l is an end view of a lathe with my I improved-mechanism applied. Fig. 2 is a side elevation of the'same, partly in section. Fig. 3 is a detailed section of the telescopic gears with their shifting mechanism. 4 and 5 are views similar to Figs. 1 and 2,

showing amodification. Fig. 6 is a detail of the clutch on the lead-screw. Fig. 7 is a detail view of the fplanetary gear and clutch. Fig. 8 is a detail 0 the change-gear clutch.

Referring to Figs. 1, 2 and 3, A represents the main frame, A the lathe head-stock, a. the spindle, and B the lead-screw or driven. element, by means of which the tool is driven. The spindle a carries a gear a which meshes with and drives a gear O, carried by a sleeve 0. Within sleeve 0 and splined thereto is a gear D.

E represents a gear formed on the end of the spindle e, to which the sleeve (1 is splined. The spindle e is wise by nut or collar e.

being long enough to preserve contact with gear and gears C D are shifted endwise by means speed of the driven parts and gear N,

Fig.

held against movement end- I Gears O D are 1 adapted to slide endwise on spindle e, so as to I cover or uncover gear E as required, gear a.

C in whatever position. The sleeves c d of pins 0 d engaging annular grooves in the of thread which it is set to cut.

is provided journaled a housing H, which by means of with a handle H and latch h,

ing positions. Within this housing are mounted on the lead-screw two ears I J upon sleeves 'L j, while the knurl is provided with clutch-teeth adapted to engage and lock either sleeve 11 or j to the lead-screw. Gears K L on shaft k mesh with and drive gears I J, while the gear K in turn receives motion eitherdirectly from gear or pinion M on shaft m or indirectly therefrom through which with gear K is mounted on a plate N, which is adapted to be shifted relative to the housing, so as to bring either gear K or N into engagement with gear M to drive the lead-screw in forward or reverse direcbler knurl, by which the plate is adjusted.

The gear M carries a sleeve m and a springactuated clutch-plate n to receive any one of a series of change-gears 1 to 8, any one of which may be slipped on the sleeve m or removed therefrom and replaced by another. These gears 1 to 8 are in line with and adapted to engage any one of the gears O D E, according to the position of said gears O D E relative to each other. In order that the gears 1 to 8 may be conveniently interchanged and may not be liable to loss or misplacement, I preferably provide a housing or casing O, attached to the head-stock, in which are a series of recesses P to receive the gears and a series of push-pins p, by means of which the gears may be pushed from the recesses onto the sleeve m. In order to replace is pressed, which forces the shoe (1 against the face of the gear and strips it from the sleeve m into the recess opposite which the end of the sleeve has been brought. R represents an extension of the housing to prevent the gears 1 to 8 becoming dislodged from their recesses. The handle H permits the housing being shifted to bring the sleeve m opposite any desired change-gear and thence to a sleeves and being shifted by means of aslide G represents a latchtion and at the same time point out the class At the end of the lead-screw is mounted or which it may be adjusted and locked to varyon the sleeve m, except to return it to its'reposition to cause said gearrto receive motion-- from one of thegearsyiQ I) E, and thergeby drive the lead-screw. The face of casingO prevents the detachment of thechange-gear ceptacle. Thus the change-gears are always locked in place and cannotbecome detached, lost, or misplaced, since-it isnecessa-rytoreturn each change-gear to its compartment before another change-gearcan-beplacedl on the sleeve m thepl ate Rholdinga-l-l exceptthe gear to be used in their compartments.

'In the modification, Figs. 4to 6, driving gear 10 is carried by the-lathe-spindleand transmitsmotion through one or both gears 1 1 and 12-togear 1 3- to drive it info-rward or reversed-irection. 14 1-5- 1 6 represent telescopic or concentric gears-similarto O DE of Figs. 1- and 2, which may be shifted by" means of thecam-plateof Figs. 2. and 3: or byhand by means of knurls or knobs -1 7 18. The lead-screw or driven elementfil is driven from shaft 20 through gears 21 22 at high speed or through gears 23 24 at reduced speedsay at a ratio of eight to one. 25 repvresents a-clutch' shifted by lrnurl 2.6 to clutch either gear 22 or 24 to -the lead-screw. A gear 27 onsha-ft 20 receives-motion from-a planetary gear28 orone which-can be -ad- 0 justed concentrically about 'thegear 27-011 stud-shaft 29, said gear-28 correspondingto gear M' ofFigs. 1 and 2. The sleeve 30 of gear 28, carrying-a-spring clutch31 is-adapted'to clutch thesleeve to any one of a series of change-gears 1 2 3 4,,said change-gears being designed to be readily slipped onor off the sleeve 30 by hand. The housing '32 serves as a support for stud-shaft'29-and is adapted tobe moved by handle 33- to cause 40 the change-gear in-useto engage one orother of thetelescopic gears14 15 16, thereby completing'the train of gearing between thespin: dle and lead-screw or drivingand driven gears. The change-gears when not inuse are housed in a recess-34in the-front ofthe headstock, which recess-isclosed by alid 35, which is keyed to a hinge or pivot rod 3 6, which journals in ears- 37. One end of rod 36 is threaded into a clamp-plate 38, which engages and serves to lock-the housing in placewhen the lid 35 isclosed and to-release the samewhen the lid is opened, whichis'eh fected by causing the screw-threaded endof rod 36 tod'raw' up or-tig'hten the'clampplate when the lid closes and to unscrew-torelease it when the lid opens.

The above mechanism is simple, can be quickly operated to effect the changes, and givesa greatly-increased-range of changes.

The mechanism herein disclosed is capable of considerable modificationwit'hout: departingfrom the-principle of my invention.

Having described my' invention, what I claim is- 1. In a device of the character'indicated, a

driving-gear, a series of concentric telescopic gears adaptedito,jreceiilfimQ lifin in common from the driving-gear, a driven gear, a housingaggearcarried by said housing and in mesh .with the driven gear, a series of gears adaptedto. be interchangeably employed to drive said gear carried by the housing, and means gears so as to selectively engage said changegear withany oneofft'he concentric gears.

'2'. In a deviceof the character-indicated, a

fined, one ormore telescopicgearsarranged-to slide on said pinion, one of which engages said driving-gear, means f'or adjusting said telescopic gears longitudinally into -predetermined positions, a driven element: receiving motion-therefrom, -a pinion adjustable concentrically about the axis o'f"the driven element, -means for changing the speed and reversing" the motion: ofsaiddriven element relative to said pinion-,-a-series: oi indepent-l by the axis of saidconcentrically-adjustable pinion, and means for attaching: any' selected one of saidindependent gearsto'said concent-ricztlly-adjustetblepinion. 3. "Ina deviceof thecharacterindicated,-a pinion longitudinally fixed, one or-moretelescopic gears arranged torotate with and to slide u on-said pinion, grooves provided in the hu s of said gears, shoes: providedwith pins and engaging said grooves, a cam engag- "ing said pins and means for adjusting said gears longitudinally by themovement of said cam.

4. In a device of the character indicated,-a driving-gear, a series of telescopic gears driven by said driving-gear, a driven-gear, an adjustable pinion; imparting -motion to said driven gea-r, intermediate gearing between a series of independent change-gears: mounted in the path 1 described by 'the--aXis:--of=-said adjustable pinion, means-for attaching any selected one of said independent changegears tosaidj ad-jnstable pinion, and: means for mes'hi ng any selected one of said changegearswithrany one o'fsaid-telescopie gears 5. In a. device o'f the-characterindicated, a driving-gear a seriesof di-fferent-diameter gears driven bys aid, driving-gotta; an adj ustable pinion, a change gear adapted to-be temporarflyclutchedto saidpinion and to mesh with any one otsaidseries of differentdiameter gears, and a driven gear receiving motion fromsaid adjustable-pinion.

6. En adevice-of'?the characterindicated; a driving gear, a pinion, a pinion-shaft jourtelescopic :gearssplined and arranged toslide on said pinion sha'ft andhmeshing with said driving-gear, means-for longitudinallyadjustingsaidtelescopicigears, a driven gear, a pinion imparting motion to said driven: gear,

driving-gear, a pinionlongitudinally con ent change-gears; held in the'p ath described said dI IVGI'l gear and said adjustable pinion,

naled andg longitudinally fi'xed, a series o'iv "for telescopically shifting said concentric a series of independent change-gears arranged to be selectively connected With said last-named pinion and to engage any one of said telescopic gears, a receptacle for said independent change-gears when not in use, and means for locking said change-gears in said receptacle while said telescopic gears and selected change-gear are intermeshed.

7. In a device of the character indicated, a driving-shaft, a series of concentric telescopic gears driven in common therefrom, a series of interchangeable gears adapted to selectively engage said concentric gears, and a cam-plate adapted by its movements to suecessively shift said concentric gears into the path of said change-gears.

8. In a device of the character indicated, a driving-gear a driven gear, a'pinion adjustable concentrically about the driven gear and adapted to impart motion thereto, a clutch carried by said pinion, a series of changegears adapted to be selectively engaged by said clutch, and while so engaged shifted into engagement with the driving-gear.

9. In a device of the character indicated, a driving-gear a driven gear, a pinion in mesh therewith, a stem projecting at one side of said pinion, a clutch carried on said stem, a series of change-gears adapted to interchangeably seat on said stem and engage said clutch, said change-gears being adapted to be shifted into and out of engagement with said driving-gear.

10. In a mechanism of the character indicated, a driving-gear, a driven element, a pinion mounted upon an adjustable axis and imparting motion to the driven element, a stem carried by said pinion, a clutch on said stem, a series of gears adapted to be interchangeably seated on said stem in engagement with said clutch, mechanism for shifting the interchangeable gear, temporarily in use, into and out of engagement with the driving-gear, and means interposed between said adjustable pinion and the driven element to change the speed of the driven element relative to said adjustable pinion.

11. In a device of the character indicated,

a driving-gear, a series of telescopic gears driven by said driving-gear, a driven gear, a housing mounted concentric with said driven gear, a pinion carried by said housing and imparting motion to'said driven gear, a clutch carried by said pinion, a series of independent changegears arranged to be interchangeably mounted on said clutch, a plate opposite said clutch to hold said independent change-gears in engagement with said clutch, and means for selectively engaging any one of said independent changegears with any one of the series of telescopic gears.

12. In a device of the character indicated, a drivin '-gear, a driven gear, a pinion concentrical y adjustable about one of said before-mentioned gears, a clutch carried by said concentricallyadjustable pinion, a series of change-gears adapted to be selectively attached to said clutch and adjusted into position to transmit motion from the driving to the driven gear through said pinion, a receptacle to receive such changegears when not in use, and means for automatically locking said change-gears in the receptacle when the gears are adjusted to transmit motion from the driving to the driven gear.

In testimony whereof I have affixed my signature in presence of two witnesses.

WILLIAM L. SCHELLENBACH.

Witnesses:

ADAH DENIS, C, W. MILES. 

